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Tamiasciurus

Osteichthyes - Rodentia - Sciuridae

Taxonomy
Tamiasciurus was named by Trouessart (1880). It is extant. Its type is Tamiasciurus hudsonicus.

It was assigned to Tamiasciurini by Mercer and Roth (2003); and to Sciuridae by Trouessart (1880), Wilson (1967), Kurten and Anderson (1980), McKenna and Bell (1997), Eshelman et al. (2025).

Species
T. hudsonicus (syn. Sciurus douglasii, T. mearnsi, Sciurus tenuidens) (type species)
Species lacking formal opinion data
T. tenuidens, T. yusheensis

Synonymy list
YearName and author
1880Tamiasciurus Trouessart
1967Tamiasciurus Wilson p. 208
1980Tamiasciurus Kurten and Anderson p. 221
1997Tamiasciurus McKenna and Bell
2003Tamiasciurus Mercer and Roth
2025Tamiasciurus Eshelman et al. p. 97

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
RankNameAuthor
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentia
superfamilySciuroidea
familySciuridae
tribeTamiasciurini
genusTamiasciurusTrouessart 1880

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. Tamiasciurus Trouessart 1880
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Tamiasciurus hudsonicus Erxleben 1777 [American red squirrel]
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Invalid names: Sciurus douglasii Bachman 1839 [synonym], Sciurus tenuidens Hay 1920 [synonym], Tamiasciurus mearnsi Allen 1898 [synonym]
Diagnosis
No diagnoses are available
Measurements
partNmean

Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: arborealg
Diet: granivoref
Diet 2: frugivoref
Reproduction: viviparoussubc
Created: 2012-05-15 12:58:23
Modified: 2012-05-15 02:58:23
Source: g = genus, f = family, subc = subclass, c = class, subp = subphylum
References: Hendy et al. 2009, Lillegraven 1979, Samuels and Van Valkenburgh 2008, Nowak 1991, Ji et al. 2002, Carroll 1988

Age range

Maximum range based only on fossils: base of the Early/Lower Pliocene to the top of the Holocene or 5.33300 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 3.6 Ma

Collections (33 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Pliocene5.333 - 3.6China (Nei Mongol) T. yusheensis (75300)
Pleistocene2.58 - 0.0117USA (Maryland) Sciurus hudsonicus, Sciurus tenuidens (126660)
Pleistocene2.58 - 0.0117USA (West Virginia) T. hudsonicus (123875 124319 125941)
Irvingtonian1.4 - 0.21USA (Arkansas) Sciurus hudsonicus (20290)
Irvingtonian1.4 - 0.21USA (Virginia) T. hudsonicus (20388)
Irvingtonian1.4 - 0.21USA (West Virginia) T. hudsonicus (20554)
Irvingtonian1.4 - 0.21USA (Maryland) Sciurus hudsonicus, Sciurus tenuidens, Sciurus tenuidens (20302)
Irvingtonian1.4 - 0.21USA (Colorado) T. sp. (20477 20559)
Late/Upper Pleistocene (high glacial)0.129 - 0.0117Canada (Alberta) T. hudsonicus (93528)
Late/Upper Pleistocene (glacial)0.129 - 0.0117USA (California) Sciurus hudsonicus (155393)
Late/Upper Pleistocene0.129 - 0.0117USA (California) Citellus douglasi (74235 93250) T. sp. (225801)
Late/Upper Pleistocene0.129 - 0.0117USA (Virginia) T. hudsonicus (103991 104758) T. tenuidens, T. hudsonicus (82258)
Late/Upper Pleistocene (late glacial)0.129 - 0.0117Canada (British Columbia) T. hudsonicus (83951)
Late/Upper Pleistocene (late glacial)0.129 - 0.0117USA (Tennessee) T. hudsonicus (82890)
Late/Upper Pleistocene0.129 - 0.0117USA (West Virginia) T. hudsonicus (93332 123868 124198 124199)
Late/Upper Pleistocene - Holocene0.129 - 0.0USA (Virginia) T. hudsonicus (104034 104035)
Late/Upper Pleistocene - Holocene0.129 - 0.0USA (Missouri) T. sp. (63566)
Holocene0.0117 - 0.0USA (Montana) T. hudsonicus (162133)
Holocene0.0117 - 0.0USA (Virginia) T. hudsonicus (104040)
Holocene0.0117 - 0.0Canada (Ontario) T. hudsonicus (221863)
Holocene0.0117 - 0.0Canada (Quebec) T. hudsonicus (221970 224189)